Insulator-supporting bracket.



,C. L. PEIRCE, JR. INSULATORVSUPPORTING BRACKET. APPLICATION FILED APR. 6, 1916.

Patented Jan; 16, 191?.

UNITED STATES PATENT orator;

CHARLES, L. PEI RCE, JR or PITTSBURGH, PENNSYLVANIA. ASSIGNOR or ONE-HALF TO HUBBARD & oo. .,or PITTSBURGH, P

I ,SYLVANIA.

INSULATOR -SUPPORT ING BRACKET.

To all Ir/mm it may concern Be it known that I. Cnanrics L. Primer,

.Ir.. a citizen of the lnited States. and a resident oi Pittsburgh. in the county of .\lle-' in Insulator-Snpporting Brackets. of which the following is a specification.

My invention relates to insulator supporting brackets which are particularly adapted for support and use on crossairms.

One of the important objects of my invention is to provide a bracket of this class, either single or multiple point. which is formed up from a single piece of flat sheet metal of suitable gage and dimensions and bent to such cross-section at variouspoints as to give maxin'uim strength with minimum amount of metal and 'without' unnecessary weight. Multiple point brackets have been bent up from stock channel bar and other stock bar but the trouble with such construction is that theneccssary strength cannot be obtained where desired unless oversize stock is chosen. In other words. with stock material oi' lixed dimensions there will be eX- cessmetal in certain parts of the structure in order to get sullicient strength elsewhere. However. by forming up the bracket i'roni llat' sheet metal to varying cross-sections the necessary strength can be obtained at-any point without excess metal atother points,

and, with the same or even less weight of metal. than would be necessary in stock bar structures a much stronger structure results. Another object of my invention is to provide ample base or seating area for my improved brackets against a supporting wall or cross-arm, and this I obtain by providing a base plate for the bracket. either separable or permanently secured thereto.

()n the accompanyingdrawing I have shown 'a bracket structure embodying the various features of, my invention.

In the drawing Figure l is a side elevatioual view showing the bracket secured to a. cross arm which is shown in section, Fig. 2 is a front elevational view of the bracket. Fig. 3 is a rear elevational view, and Fig. 4 is a cross-sectional view on plane +l4-, Fig.2.

The bracket shown comprises a body part B, the upper L-shaped part L, and the lower U-shaped part U. The bracket is termed up from a fiat sheet metal blank of suitable dimensions and bent to cross-sections which will give the necessary strength a p p V ous parts ot the structure. "Asshownrthe tion. the limbs or sides 10 a U-part I7 the sides 10 and 11 remain sepa- ENNSYLVANIAQA CORPORATION OF ZPEISIN- Specilicatiqn ofLetters Patent. Patented chili- 16, 191% ApplicationfiledAprilG,1916. 'se1-ia11\ro.89.367.' I U body part is o'tarched or U-shaped cross secnd 11 eite'nding rearwardly and being either parallel'br at angles with each other. In the bend oi' the'" rate and open but at the end'section e the sides or limbs'a're brought togther to form a seat of circularcross-section throughout for insulators or insulator supporting thimbles. .\s shown, a helical wlre thimble t isapplied, the uppeand lower slots 12 and 13, being provided in the end 6 for receiving the ends of the helix.

At the upper L-part of the bracket sides 10 and 11 remain open at the bendfl t but are gradually bent and roundedtowardj each other and cometogetherat the bend 15 and throughout the end (5 so that this end is of circular cross-section throughout'for re ceiving insulators or insulator supporting thimbles. As shown, a helical wire thilnble f is applied like thaton the U-end of the,

bracket; The cross-sections of the bracketv are thus made in conformity with the,

' strengthnecessary at'the various sections and owing to this practical distribution of metal,

made-possible by forming the bracket mentiber from flat sheet metal, the bracketis of metal." 4

'lhrough the front of the body part B bolt holes 16 and 17 are provided through which bolts may pass to secure the bracket to a wall or other support. In order to give secureseating for the bracket against a support and to prevent cutting of a support by the edges of the sides 10 and 11 I provide a base plate 18 to be interposed between the edges of the sides 10 and 11 and the sup porting surface, the plate being of height and width to give the desired support on gaging area. The plate may be separate, or may be permanently attached to the bracket. As shown, the upper and lower parts of the plate a re deflected forwardly to form flanges 19, 20', 21 and 22 for engaging against the sides 10 and 11 of the body part 'and may 'secured'to the bracket, it will. be held in maximumstrength with minimum weight of place by the bolts passing through its bolt holes,

Asshown in the drawings, the plate particularly adapts the bracket structure for mounting on a cross-arm 26. The upper side sections of the plate are deflected rearward-1y, tofo'rm supporting tongues 27 and 28 for e ngaging with ,the top of the cross arm tolwhich the bracket member may be secured by ordinary bolts or screws, or by a strap 29 which surrounds the cross arm and 'whose threaded ends 30 and 31 extend forwardly through the bolt holes 24 and 25 of the plate and the holes 16 and 17 of the bracket body to be engaged by nuts 32 and 33. When thus supported the tongues 27 and 28 give additional vertical support to the bracket. a

' If desired, intermediate insulator suporting parts may be securedto the bracket etween the upper and lower parts L and U.

As shown, a U-fitting 34 is secured to the bracket body by a rivet 35, the back of the fitting being of arch-shaped cross-section to snugly straddle the arched body of the bracket. The fitting is adapted at its outer end for supporting an insulator, a helical thimble 6 being shown.

The bracket structure shown and described has proven to be very efiicient, its

' great strength with com arative lightness adapting it particularly orapplication to cross-arms and for comparatively heavy service. I do not of course desire to be limited to the exact construction and arrangement shown and described as changes and modifications are no doubt possible which would still come within the scope of the invention.

I claim as follows:

1. An insulator supporting bracket comprising a body part and an end part extending forwardly and upwardly therefrom, said body and end parts being of channel shaped cross-section and open at the back and the upper end of the end part being formed to receive an insulator or insulator supporting thimble, a base plate of sheet metal extending across the open back of the body part and having ears extending therefrom and being secured to the body part bysaid ears, and bolt holes through said body part.

2. An insulator supporting bracket comprising a body part and an end part bent forwardly and upwardly, said bracket being of a single piece of sheet metal and of channel shaped cross-section open at the back, the end of the end part being formed to receive an insulator or insulator supporting thimble, a base plate extended across the 3. An insulator supporting bracket comprising a body part bent transversely to arch shaped cross-section and having insulator receiving ends, a sheet metal plate applied to the edges of said body part and having wings deflected therefrom for engaging with the sidesof the body part, there being registering bolt holes through said body part and plate.

4. An insulator supporting bracket comprising a sheet metal body part bent transversely to arch cross-section and having an insulator receiving end, a backing plate of sheet metal bridging the edges of the body part and permanently secured thereto, said body part and plate having registering bolt holes.

in witness whereof I hereunto set my hand this 26th day of February, A. D., 1916.

CHARLES L. PEIROE, JR. 

